n75 k valve for my 00 s4, working on a boost gremlin and n75 is suspect, i just dont want to go buying all sorts of little parts before i know what it is. shoot me an email or reply, TIA
tim

The n75's are easy enough to test. Put 12 volts to it and see if it picks.

<center><img src="http://pictureposter.audiworld.com/38975/16n75a-med.jpg"></center><p>

did you do a pressure test of the system?

have you pulled any logs via vag-com?